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Finding the Fourth Proportional to 9,784.62, 14,678.28 and 3,211.47

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Solution

The fourth proportional to 9,784.62, 14,678.28 and 3,211.47 is: 4,817.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,784.62 : 14,678.28 = 3,211.47 : x
  2. Step 2: Convert to fraction form
    9,784.62/14,678.28 = 3,211.47/x
  3. Step 3: Cross multiply
    9,784.62x = 14,678.28 × 3,211.47
  4. Step 4: Simplify right side
    9,784.62x = 47,138,855.87
  5. Step 5: Solve for x
    x = 47,138,855.87/9,784.62
  6. Step 6: Final answer
    x = 4,817.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.